Improved draw bead forming die

Abstract

The utility model provides an improved generation pull ring forming die has solved the problem that the burr at present pull ring place is easy to scratch the surface of antiskid point after the bending shaping, still include the avoidance groove, set up in the front end of lower mould, protruding portion, set up in the cavity of lower mould and with avoidance groove corresponding, the width of protruding portion is greater than or equal to the width of avoidance groove. When the cooperation of upper die and lower die, the connecting rib is pressed down to the avoidance groove, can prevent the connecting rib from being extruded and cut off, and the protruding portion is used for protruding the lower surface of pull ring upward, so that the burr has the gap when bending shaping and will not scratch the surface of antiskid point.

Description

Technical Field

[0001] This utility model relates to the field of pull-tab mold technology for beverage cans, and specifically to an improved pull-tab forming mold. Background Technology

[0002] The pull tab on an aluminum can is the device used to open the can. Stress is applied to the pull tab, causing the can lid to crack along a pre-made indentation, allowing for quick opening. During the forming process, the pull tab is connected to the material strip via connecting ribs. When the pull tab and the base lid are riveted, the connecting ribs need to be cut. After cutting, a burr 01 remains at the pull tab. This burr 01 needs to be bent and shaped. However, after bending and shaping, the burr 01 comes into contact with the anti-slip point 02 (the anti-slip point's function is to lift the rear end of the pull tab, ensuring a gap between the rear end of the pull tab and the can lid for easy opening by hand). Figure 1 , Figure 2 As shown in the figure, it is easy to leave marks on the anti-slip point 02, which will cause the surface of the anti-slip point 02 to be scratched. Utility Model Content

[0003] To overcome the shortcomings of the prior art, this utility model provides an improved pull ring forming mold, which solves the problem that the surface of the anti-slip point is easily scratched after the burrs at the pull ring are bent and shaped.

[0004] The technical solution adopted in this utility model is as follows: The improved pull ring forming die includes a lower die and also includes: The clearance groove is located at the front end of the lower mold; A protrusion is provided in the cavity of the lower mold and corresponds to the clearance groove. The width of the protrusion is greater than or equal to the width of the clearance groove.

[0005] The protrusion has an arc-shaped transition surface in its circumference.

[0006] The outer wall of the rear end of the lower mold is provided with a slope.

[0007] The top surface of the clearance groove is chamfered.

[0008] The cavity and protrusion of the lower mold are an integral structure.

[0009] The beneficial effects of this utility model are: When the upper and lower dies are engaged, the connecting ribs are pressed down into the clearance groove to prevent the connecting ribs from being squeezed and cut off. The protrusion is used to raise the lower surface of the pull ring, so that the burrs have a gap with the bottom when bending and shaping, and will not scratch the surface of the anti-slip point. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the existing technology of the pull ring and the base cover fitting together.

[0011] Figure 2 yes Figure 1 Enlarged diagram of point A in the middle.

[0012] Figure 3 This is a top view of the present invention.

[0013] Figure 4 This is a three-dimensional schematic diagram of the present invention.

[0014] 1. Avoidance groove; 2. Protrusion; 3. Arc-shaped transition surface; 4. Bevel; 5. Chamfer. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments: In the embodiments, such as Figure 3 , Figure 4 As shown, the improved pull ring forming die includes a lower die and also includes: Clearance groove 1 is located at the front end of the lower mold; The protrusion 2 is disposed in the cavity of the lower mold and corresponds to the relief groove 1. The width of the protrusion 2 is greater than or equal to the width of the relief groove 1.

[0016] When the upper and lower dies are engaged, the connecting ribs are pressed down into the relief groove 1 to prevent the connecting ribs from being squeezed and cut. The protrusion 2 is used to make the lower surface of the pull ring protrude upward, so that the burr 01 leaves a gap with the bottom during bending and shaping, and will not scratch the surface of the anti-slip point 02.

[0017] In the embodiments, such as Figure 3 , Figure 4 As shown, the protrusion 2 has an arc-shaped transition surface 3 in its circumference. This makes the circumference of the protrusion 2 smooth, preventing material jamming and ensuring that the pull ring will not be scratched.

[0018] In the embodiments, such as Figure 4 As shown, the outer wall of the rear end of the lower mold is provided with an inclined surface 4. The inclined surface 4 can prevent the material from getting stuck during feeding and serves as a guide.

[0019] In the embodiments, such as Figure 3 , Figure 4 As shown, the top surface of the clearance groove 1 is chamfered 5. When the upper mold and the lower mold are engaged, it facilitates the entry of the connecting rib into the clearance groove 1.

[0020] In the embodiments, such as Figure 3 , Figure 4 As shown, the mold cavity of the lower mold and the protrusion 2 are an integral structure. The protrusion has good strength, resulting in high precision after the pull ring is formed.

[0021] Obviously, the above embodiments of this utility model are merely illustrative examples and not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, these obvious variations or modifications derived from the essential spirit of this utility model still fall within the protection scope of this utility model.

Claims

1. An improved pull ring forming die, comprising a lower die, characterized in that, Also includes: The clearance groove (1) is set at the front end of the lower mold; The protrusion (2) is provided in the cavity of the lower mold and corresponds to the relief groove (1). The width of the protrusion (2) is greater than or equal to the width of the relief groove (1).

2. The improved pull ring forming die as described in claim 1, characterized in that: The protrusion (2) is provided with an arc-shaped transition surface (3) in the circumference.

3. The improved pull ring forming die as described in claim 1, characterized in that: The outer wall of the rear end of the lower mold is provided with an inclined surface (4).

4. The improved pull ring forming die as described in claim 1, characterized in that: The top surface of the clearance groove (1) is provided with a chamfer (5).

5. The improved pull ring forming die as described in claim 1, characterized in that: The cavity of the lower mold and the protrusion (2) are an integral structure.

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